Recent questions tagged q106

If the pressure of $N_2/H_2$ mixture in a closed vessel is 100 atm and 20% of the mixture then reacts , the pressure at the same temperature would be

asked Mar 1, 2014 by sharmaaparna1

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Kjeldahl's method cannot be used for estimation of nitrogen in $(i)\; C_6H_5NO_2 ;\; (ii)\;Pyridine; \;(iii)\;C_6H_5 - N = N -C_6H_5 ;\;(iv)\;C_6H_5NHCOCH_3 $

asked Feb 28, 2014 by meena.p

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Phenols can be prepared by

asked Feb 26, 2014 by sreemathi.v

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Find the position of the point (2,3) relative to the hyperbola $9x^2-y^2=1$?

asked Feb 10, 2014 by sreemathi.v

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If $S_{n}=\frac{1}{6}\;n\;(2n^2+9n+13)\;$, then $\sum_{r=1}^n\;\sqrt{a_{r}}\;$ equals.

asked Jan 20, 2014 by yamini.v

1 answer

What electron transition in a hydrogen atom,starting from the orbit $n=7$ will produce infrared light of wavelength 2170nm?( $R_H=1.09677\times 10^7m^{-1})$

asked Jan 16, 2014 by sreemathi.v

1 answer

The position vector of the vertices $A,B,C$ of a $\Delta\: ABC$ are $\hat i-\hat j-3\hat k,\:2\hat i+\hat j-2\hat k\:\:and\:\:-5\hat i+2\hat j-6\hat k$ respectively. The length of the bisector $AD$ of angle $A$ where $D$ is on the line $BC$ is ?

asked Jan 5, 2014 by rvidyagovindarajan_1

1 answer

The left hand derivative of $f(x)=[x]\sin(\pi x)$ at $x=k$, where $k$ is an integer is

asked Dec 31, 2013 by sreemathi.v

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Integrate : $\int \large\frac{e^x + \cos x }{e^x+ \sin x} $$dx$

asked Dec 19, 2013 by meena.p

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Which one of the following phyla is correctly matched with its two general characteristics ?

asked Dec 18, 2013 by thanvigandhi_1

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If the ratio of maximum and minimum intensities of an interference pattern is 36 : 1, then the ratio of amplitudes of the two interfering waves will be :

asked Nov 17, 2013 by thanvigandhi_1

1 answer

When a liquid filled in two vessels A and B of equal volumes, is heated, the coefficients of apparent expansions of the liquids are found to be $ \gamma_1\: and \: \gamma_2$ respectively. If $ \alpha_1$ be the coefficient of linear expansion of A, then the coefficient of linear expansion of B will be :

asked Nov 2, 2013 by thanvigandhi_1

1 answer

If 'f' is focal length of lens in Ramsden's eye peice, crossed wires are placed at

asked Oct 20, 2013 by thanvigandhi_1

1 answer

In Fraunhoffer diffraction experiment , L is the distance between screen and the obstacle, b is the size of the obstacle and $\lambda$ is wavelength of incident light. The general condition for the applicability of Frauhoffer diffraction is

asked Oct 18, 2013 by meena.p

1 answer

An infinitely long thin straight wire has uniform linear charge density of $ \large\frac{1}{3}\;$$ coul.m^{-1}. $ Then the magnitude of the electric intensity at a point 18 cm away is : (given $\in _{0}=8.8 \times 10^{-12} C^2 /N-m^2)$

asked Oct 14, 2013 by meena.p

1 answer

When a liquid is heated in a glass vessel, its coefficient of apparent expansion is $ 1.03 \times 10^{-3}/^{\circ}C$. When the same liquid is heated in a copper vessel, its coefficient of apparent expansion is $ 1.006 \times 10^{-3}/^{\circ}C$.If the coefficient of linear expansion of copper is $ 17 \times 10^{-6}/^{\circ}C$, then the coefficient of linear expansion of the glass is

asked Oct 10, 2013 by thanvigandhi_1

1 answer

Two coherent sources whose intensity ratio is $64 :1 $ produce interference fringes. The ratio of intensities of maxima and minima is :

asked Sep 30, 2013 by meena.p

1 answer

Two uniform stretched string A and B, made of steel , are vibrating under the same tension. If the first overtone of A is equal to the second overtone of B and if the radius of A is twice that of B, the ratio of the lengths of the strings is :

asked Sep 24, 2013 by meena.p

1 answer

A short bar magnet having magnetic moment $4\;Am^2,$ placed in a vibrating magnetometer, vibrates with a time period of 8 seconds. Another short bar magnet having a magnetic moment $8\;Am^2$ vibrates with a time period of $6$ seconds. If the moment of inertia of the second magnet is $9 \times 10^{-2}\;kg\;m^2,$ the moment of inertia of the first magnet is (Assume that both magnets are kept in the same uniform magnetic induction field.)

asked Sep 18, 2013 by meena.p

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If a compound statement is made up of three simple statements, then the number of rows in the truth table is

asked May 24, 2013 by poojasapani_1

1 answer

The difference between the focal dintences of any point on the hyperbola $\large\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=$$1$ is $24$ and the eccentricity is $2$. Then the equation of the hyperbola is

asked May 14, 2013 by poojasapani_1

1 answer

If X follows binomial distribution with parameters n=5,p and P(x=2)=9,P(X=3),then p=__________.

asked Jan 10, 2013 by sreemathi.v

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True or False: If f.g is continuous at $x=a$,then f and g are separately continuous at $x=a.$

asked Jan 3, 2013 by sreemathi.v

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